Madrid Río Park

"The Madrid Rio Park spreads along the Rio Manzanares and can be accessed from Principe Pio and Avenida de la Florida all the way down to Piramides. It's an excellent park for fitness, biking, rollerblading, or simply taking in the slow but steady regeneration of the river-- On the southern border of the city, the park has a really interesting bridge--Puente monumental de Arganzuela--which is worth checking out if you have any interest in architecture or urban design."